Grooveshark now offers a mobile webapp that plays music without the help of Flash, works on just about any smartphone, and doesn't require a Grooveshark Premium account to use.

Grooveshark, one of our favorite music streaming services, has long offered apps for Andorid, jailbroken iPhones (after being pulled from the App Store), and other devices, but they require a premium account to use. If you aren't jailbroken and just want to listen to a couple songs, their new HTML5-powered webapp will work wonders. It's in beta right now, and still pretty feature-bare, so don't expect to be able to log in and listen to your playlists. You can, however, search for artists, listen to streaming radio stations, or see what's popular, which is great for those quick one-off listens if you don't have a particular song on your iPod. And, like other HTML5-powered webapps, it can keep playing music even if you close Safari. To check it out, just head to html5.grooveshark.com on your phone.